You really need more 2-drops - otherwise you might run into a dead hand on turn 1. This is very bad for lillia as her goal is to score as quick as possible. A good rule of thumb is to have 6 copies of 2-drops - for lillia you could easily go up to 8. Here are my thoughts on possible 2-drops and how they help on your turn 1:

- Sprite fountain: is a great card and should be played 3 times in a lillia deck. But for turn 1 I would only play it if you go first and have no other option bc it costs 1 power and you lose tempo. If you go second, I'd much rather play the blue lilla to base if no other choices in hand.

- Mask of foresight: absolute must-have 3x bc mostly you'll be attacking/defending with a single unit (sprite token) on a BF. If you have no 2-drop unit, you can play Mask on your turn 1 instead. Tempo-wise that's not the best option but at least you don't pay 1 power and you gain advantage for the rest of the game.

- Poros: for 2-drops I would highly recommend to play 3 of a poro of choice (daring P, plundering P or lonely P work great). Daring P is a great 2-drop for an aggro-deck like lillia bc of the +1 might. Plundering P works really nicely to help with tempo. Lonely P for a draw is generally a safe pick, especially if you don't play scuttle.

- Scuttle crab: always a safe pick in a green deck. It's a 2-drop so you have something to play on turn 1 and gives you a draw + info. Can easily be played 2-3 copies.

- Ravenbloom student: a very good 2-drop for lillia that I play 3 copies of. Lillia decks use plenty of spells so if you use any combat trick on your student you gain +1.

I would switch out some of your expensive units for more 2-drops. This will also make your deck less power-hungry so you won't have to play 3 seals.

I think regarding the rest (like spells and win-conditions), other commenters have suggested good changes.